\usepackage{tikz}

\usetikzlibrary{shapes, arrows}

\tikzstyle{decision} =
        [
                diamond,
                draw,
                fill = green!20,
                text width = 6em,
                text badly centered,
                node distance = 2cm,
                inner sep = 0pt
        ]
\tikzstyle{block} =
        [
                rectangle,
                draw,
                fill = blue!20,
                text width = 6em,
                text centered,
%                rounded corners,
                minimum height = 2em
        ]
\tikzstyle{line} =
        [
                draw,
                -latex'
        ]
\tikzstyle{cloud} =
        [
                draw,
                ellipse,
                fill = red!20,
                node distance = 1.5cm,
                minimum height = 2em
        ]
        
\tikzstyle{print_block} =
        [
                tape,
                draw,
                tape bend top=none
                text width = 6em,
                text badly centered,
                node distance = 1cm
        ]
